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Which number has only 2 factors a.21 b.23 c.25 d.27 answer please



Sagot :

Answer:

D.

Step-by-step explanation:

Which number has only 2 factors

a.21

b.23

c.25

d.27

Explanation:

Factors of 21 : 1,3,7,21,...

Factors of 23 : 1, 23,...

Factors of 25, 1,5,25,...

Factors of 27: 1, 3, 9,...